How to preserve lettuce?
Lettuce can be put in the refrigerator. If it is peeled, the leaves on the head of lettuce need to be pinched off and stored separately. The low temperature in the refrigerator can inhibit the growth of harmful microorganisms. Therefore, lettuce can be sealed with plastic wrap and stored in the freezer for about 5 days. Put the bought lettuce in a container filled with cold water, a few at a time, until the lettuce is dried 1/3, and leave it indoors for 3-5 days, the leaves are still green, the lettuce is still fresh, and it is still fresh after peeling. It is delicious. Lettuce can be kept upright and stored at room temperature for 3-5 days. Lettuce has been stored for a long time. If it does not become soft, red, bleeding, smelly, moldy and other deterioration phenomena, you can continue to eat. If lettuce is stored for a long time and goes bad, it is not suitable for eating. In addition, lettuce has been stored for more than a week, and it is recommended not to eat it regardless of deterioration.
What nutrition and efficacy does lettuce have?
Lettuce contains protein, fat, vitamins, sugars, dietary fiber and trace elements, which can stimulate appetite and regulate gastrointestinal function. It contains dietary fiber, which can stimulate intestinal peristalsis, moisten the intestines to relax bowels, and increase satiety, and has high water content and low calories, and can play a role in slimming; Contains zinc and iron, which can supplement iron for human body and prevent iron deficiency anemia; Containing potassium, it can balance the pH in the body, and has diuretic, detumescence and blood pressure lowering effects; Contains nicotinic acid, which can improve the metabolic function of sugar and help to treat diabetes. Lettuce is a vegetable with high potassium and low sodium. Every100g of lettuce contains 212mg of potassium and 36.5mg of sodium. Potassium is an essential element to maintain human life, which can dilate arteries, reduce peripheral vascular resistance, promote urinary sodium excretion, reduce cardiovascular burden, reduce arterial wall thickening in patients with hypertension, and achieve the purpose of lowering blood pressure. People with hypertension and arrhythmia often eat fresh lettuce, and the effect is remarkable. Lettuce is rich in potassium ion, which is 27 times that of sodium salt, which is beneficial to the balance of water and electrolyte in the body and promotes urination. Lettuce contains more nicotinic acid, which can increase milk secretion and is an important member of maternal diet.
Lettuce is a little bitter. Can I eat?
You can eat it, but it tastes bad. The bitter taste of lettuce mainly comes from its lettuce element, which is mainly caused by the increase of lettuce element content when the temperature is too high or the water is lacking during the growth process. This bitter taste may be strong, but there is no toxin, which will not bring any side effects to the human body, but the taste is slightly poor and the nutritional value is not high. This shows that lettuce is edible when it is bitter. Lettuce tastes a little bitter, mainly because it lacks water when it grows, because lettuce itself has bitter vegetable elements. If it grows in a high temperature place, it is easy to increase the concentration of lettuce because of lack of water, so its bitterness will be more. With the development of science and technology, there are many new varieties of lettuce, which are no longer the lettuce with various medicinal values, and the bitterness of lettuce gradually increases with the varieties, so the bitterness of lettuce appears.
Lettuce is a little bitter. What happened?
1, poor variety: the variety of lettuce itself is poor, and it contains a lot of lettuce, which makes it bitter to eat. Methods to remove bitterness: blanch lettuce once before frying, or marinate it with salt for about half an hour before frying, which can generally remove bitterness.
2. The bitter taste of lettuce is caused by one substance, namely lettuce. Lettuce may encounter some problems such as water shortage during its growth and development, and the element of lettuce may increase with these factors. However, lettuce is not a toxin, and even if it is eaten, it will not have too many side effects, so lettuce can be eaten when it is bitter.